<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/钻石.png" style="width:46px; margin-left:10px" alt="" />
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>

    <!-- 侧边栏区域 -->
    <el-container>
      <el-aside :width="iscollapse ? '64px' : '200px'">
        <div class="toggle_button" @click="toggle_collapse">◀折叠▶</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#ffd04b"
          :unique-opened="true"
          :collapse="iscollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <i :class="iconObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subitem.path"
              v-for="subitem in item.children"
              :key="subitem.id"
              @click="saveNavSate('/' + subitem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subitem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>

      <!-- 内容区 -->
      <el-main>
        <router-view>111</router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script type="text/javascript">
export default {
  data() {
    return {
      menulist: [],
      iconObj: {
        125: "iconfont icon-user",
        103: "iconfont icon-tijikongjian",
        101: "iconfont icon-shangpin",
        102: "iconfont icon-danju",
        145: "iconfont icon-baobiao",
      },
      iscollapse: false,
      // 被激活的连接地址
      activePath: "",
    };
  },
  created() {
    this.getMenuLst();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    // 登出功能就是删除sessionstore里面的token
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取左侧菜单数据
    async getMenuLst() {
      const { data: res } = await this.$http.get("menus");
      console.log("获取左侧菜单数据", res);
      //   如果数据状态不为200  就报错了
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menulist = res.data;
    },
    // 折叠左侧菜单栏
    toggle_collapse() {
      this.iscollapse = !this.iscollapse;
    },
    // 储存左侧菜单栏点击路由  的状态
    saveNavSate(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 0;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: 0px;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 7px;
}
.toggle_button {
  background-color: #4a5064;
  text-align: center;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>